has violated a trade agreement, the U.S. government may initiate dispute settlement proceedings at the World Trade Organization (WTO) or any other trade agreement establishing dispute settlement provisions, such as a free trade agreement, such as the North American Free Trade Agreement (NAFTA). The U.S. government can also impose unilateral trade sanctions, such as the Generalized System of Preferences (GSP). This has happened a number of times with regard to various countries. For example, the United States imposed unilateral trade sanctions on Ukraine under section 301 on December 20, 2001, including tariffs on metals, footwear, and other imports, because the USTR had concluded that Ukraine had failed to enforce copyright in relation to music CDs and their export. Similarly, the Trump administration imposed trade sanctions under section 301 on China in March 2018, setting off the 2018 China–United States trade dispute. Super 301 timeline The original Super 301 provisions expired in 1991. However, President Clinton issued an executive order EO 12901 reactivating Super 301 for two years (1994 and 1995) The Super 301 process was again extended through 1997 by EO 12973 (September 1995), but was not in operation in 1998. On March 31, 1999, Super 301 again was re-instated for three years and revised by EO 13116. It required the USTR by April 30 to issue its Super 301 report on priority foreign trade practices and to initiate section 301 cases against such practices if agreement is not reached after 90 days. Neither the USTR's April 1999 or April 2000 Super 301 report identified any priority foreign trade practices under Super 301, but USTR did announce that it would initiate Section 301 cases against trade practices in several countries. In its April 2001 Super 301 report, USTR did not make any designations under Super 301, but did announce that consultations (the first stage in WTO dispute settlement) had been requested with Mexico on measures affecting live swine imports, with Belgium on rice import restrictions, and with the European Union on import surcharges on corn gluten feed. In a January 2002 letter report to the Senate Finance Committee on activities under Section 301, the USTR did not identify any priority foreign trade practices under Super 301, although it did report on other activities undertaken under Section 301-310 of the Trade Act of 1974. Challenged In the 1990s, Sections 301-310 of the Trade Act were challenged by a number of Members